Having trouble with symbols and animating objects that change size


Basically I am followinga book to learn flash animation for the first time. I am o’animating objects that change size’ chapter. Here are the isntructions and tutorials for me to do:

1 create a new Flash Document

  1. On the stage, ceate a new object in Frame 1.

  2. With Frame 1 selected, choose Insert > Create Motion tween.

(Flash turns your object into a symbol)

There are more steps, but the reason why I stopped here is because whenever I create a motion tween from the insert menu, the object that is on the stage ends up not able to move and I get the following message:

The current selection in layer ‘layer 1’ is a tween span which does not support drawing

I don’t have a clue what this means, and I would really appreciate it if someone could help please!!!